Pith Number

pith:EWVYDZXZ

pith:2006:EWVYDZXZC4KWMKGIPVLXYFMAFY

not attested not anchored not stored refs pending

Nodal inequalities on surfaces

Leonid Polterovich, Mikhail Sodin

arxiv:math/0604493 v2 · 2006-04-23 · math.SP · math.DG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EWVYDZXZC4KWMKGIPVLXYFMAFY}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:47:16.407401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25ab81e6f917156628c87d577c15802e2521a8a9e14943b04f26f7fce2a3731e

Aliases

arxiv: math/0604493 · arxiv_version: math/0604493v2 · doi: 10.48550/arxiv.math/0604493 · pith_short_12: EWVYDZXZC4KW · pith_short_16: EWVYDZXZC4KWMKGI · pith_short_8: EWVYDZXZ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/EWVYDZXZC4KWMKGIPVLXYFMAFY \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 25ab81e6f917156628c87d577c15802e2521a8a9e14943b04f26f7fce2a3731e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a7028e008f50956145f535257c6acc89128fd07a8fdd54c0c92004a35f0f3b2",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "",
    "primary_cat": "math.SP",
    "submitted_at": "2006-04-23T16:01:47Z",
    "title_canon_sha256": "d7a1ff83d12a1eeaddaa69effd824842286c68b6a632a1131347e5a0d776c2dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0604493",
    "kind": "arxiv",
    "version": 2
  }
}